薄钢板PEC柱-削弱截面钢梁框架层间抗震试验研究  

Test Study on Seismic Performance of PEC Column Fabricated with Thin-Walled Steel Plates-Steel Beam( Reduced Beam Section) Composite Frame

作　　者：方有珍[1] 戴雅萍[1,2] 王辰宇[1] 赵宏康 杨彬[1] 

机构地区：[1]苏州科技大学江苏省结构重点实验室,江苏苏州215011 [2]苏州建筑设计研究院有限公司,江苏苏州215021

出　　处：《西南交通大学学报》2017年第4期715-724,共10页Journal of Southwest Jiaotong University

基　　金：国家自然科学基金面上基金资助项目(51478286;51078247);江苏省"青蓝工程"中青年学术带头人资助项目(2014);江苏省高校首批优秀中青年教师出国研修计划资助项目(2011)

摘　　要：为研究薄钢板组合PEC柱(强轴)-削弱截面钢梁组合框架的层间抗震性能,设计制作1榀组合框架中间层子结构1∶2缩尺试件并对其进行水平循环往复荷载抗震试验.基于试验现象和测试数据整理,得到了试件破坏模式与滞回特征曲线,并对试件水平抗侧刚度、耗能性能和变形模式等进行了分析.研究结果显示:采用梁端截面削弱方式可通过梁端塑性铰形成位置偏离节点区以满足"强节点"的抗震要求;试件整体与层间中间层位移延性系数分别大于4.05和4.81,对应等效粘滞阻尼比最大值分别为0.288和0.286;试件结构水平抗侧刚度沿高度均匀分布,侧移变形呈理想倒三角弯剪型侧移变形模式;试件结构破坏模式为梁端削弱截面充分屈服形成塑性铰的理想塑性破坏机构,且其承载力下降到极限承载力85%时,对应试件整体与层间侧移角分别为0.043 3 rad和0.039 4 rad,相应超过框架结构大震层间侧移限值0.035 0 rad,说明试件结构具有良好的抗震延性.In order to investigate the seismic performance of a partially encased concrete （ PEC ） column fabricated with thin-walled steel plates-steel beam （ reduced beam section） composite frame, a 1/2 scale test specimen of inter-story substructure was designed and a lateral-cycle repeated loading test was conducted. Based on the test observation and measurements, the failure mode and the hysteretic characteristic loops were derived,and the seismic performances including lateral stiffness, energy dissipation capacity and drift pattern were analyzed. Tests result show that reduced beam section can achieve the target of plastic hinge forming location away from joint to meet the seismic principle of “ strong joint” ？ The displacement ductility coefficients of the inter-story and whole specimen are larger than 4. 05 and 4.81, respectively, the maximum equivalent viscous damping ratios are 0. 288 and 0. 286. The lateral stiffness is evenly distributed along the height of the specimen, the drift pattern of the specimen shows the ideal inverted triangle pattern of the flexure-shear type. The plastic failure mechanism is induced by forming plastic hinge at all reduced sections, when the load-carrying capacity of the specimen is decreased to 85% of its ultimate strength, the drift angles of the inter-story and whole specimen are 0.043 3 rad and 0.039 4 rad which all surpass the limit（0.035 0 rad） inter-story drift at the maximum considered earthquake level, indicating that the specimen has superior seismic performance.

关 键 词：薄钢板组合截面PEC柱 削弱梁截面 组合框架 中间层子结构 拟静力试验 抗震性能 

分 类 号：TU398[建筑科学—结构工程]